The "EPSILON" high speed GPR scanning system was built and currently in use by Geophysics HM Ltd for estimating the asphalt thickness for roads and HWY's. The road asphalt pavement layers are designed for interacting with wheel forces of the heavy traffic, temperature variations and and weather conditions. The performance of the pavement will dictate the quality of the road service and the life span of the structure. The thickness, structure and composition of the asphalt layers will dictate the performance of the road under different load and conditions. If the asphalt layer is thin the deterioration of the road will increase rapidly, alternatively with the increases of the thickness, the bearing capacity of the pavement increases leading to better performance and longer service.
The acquisition system is antenna interchangeable and capable of measuring the asphalt conditions up to four (4) meters below the asphalt surface. The GPR data is collected at posted traffic speed synchronously with a sub-meter precision GPS receiver mounted on the antenna enclosure. The "EPSILON" data acquisition does not require supplemental traffic management or lane closure in orderto complete the survey.
"EPSILON" high speed GPR scanning system is widely used by Geophysics HM Ltd for road structure imaging, asphalt and granular thickness estimation and road facility integrity assessment. The scanning system is successfully utilized for geotechnical profiling and mapping, concrete structure scanning, void and sinkhole mapping, utility locates and resurfacing assistance. The main advantages of the system are: